You are very likely not be able to get what you are looking for. The concept for changing the rank icons is exactly the same as changing the appearance of a gun. (I think...)
EDIT: We had a similar release, but there are no K/TW/JP/SEA AVA -> NA/EU AVA rank files.
Outdated (?), don't use them since it was made for UAVA only. Also, it's made by SteelSkinz, who was the only person here that could accomplish this. (Person is no longer active)